Shorteen is an URL shortening module for ExpressionEngine. Is does shorten the URLs by iteslf, but is letting you use wide range of shortening services. Currently supported are goo.gl, is.gd, bit.ly, lessn more and YOURLS script.

Shrimp is an ExpressionEngine plugin that provides URL shortening functionality. Shrimp is different from similar plugins by providing features like customizable link generation, access to the shortened URL for your own custom links, smart meta tags and more.

Shorten URLs creates a Quick Link at the top right of your ExpressionEngine control panel which asks for the full URL in a dialog box and returns a short URL that redirects through your own domain. The short URLs are cached and will exist for as long as you want.